Process of separating components of a fermentation broth

Patent metadata

Field	Value
Publication number	US-9994505-B2
Application number	US-201314066598-A
Country	US
Kind code	B2
Filing date	Oct 29, 2013
Priority date	Jun 4, 2009
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A process of isolating 1,4-butanediol (1,4-BDO) from a fermentation broth includes separating a liquid fraction enriched in 1,4-BDO from a solid fraction comprising cells, removing water from said liquid fraction, removing salts from said liquid fraction, and purifying 1,4-BDO. A process for producing 1,4-BDO includes culturing a 1,4-BDO-producing microorganism in a fermentor for a sufficient period of time to produce 1,4-BDO. The 1,4-BDO-producing microorganism includes a microorganism having a 1,4-BDO pathway having one or more exogenous genes encoding a 1,4-BDO pathway enzyme and/or one or more gene disruptions. The process for producing 1,4-BDO further includes isolating 1,4-BDO.

First claim

What is claimed is:

1. A process of isolating 1,4-butanediol (1,4-BDO) from a fermentation broth, the process consisting of:
a) separating fermentation broth enriched in 1,4-BDO into a liquid fraction and a solid fraction comprising cells in a separation step consisting of filtration, wherein said filtration consists of ultrafiltration, and wherein said fermentation broth comprises 1,4-BDO at a concentration of about 5% by weight of 1,4-BDO; b) removing salts from said liquid fraction of step a), wherein removing said salts comprises nanofiltration and ion exchange; c) removing water from said liquid fraction of step b); d) purifying 1,4-BDO from said liquid fraction of step c) by distillation after removing salts and water; to produce a 1,4-BDO product at least 98% pure.

2. The process of claim 1 , wherein said ultrafiltration comprises filtering through a membrane having pore sizes from about 0.005 to about 0.1 microns.

3. The process of claim 1 , wherein said removing water of step c) is accomplished by evaporation with an evaporator system comprising one or more effects.

4. The process of claim 3 , wherein said evaporator system comprises a double- or triple-effect evaporator.

5. The process of claim 3 , wherein said evaporator system further comprises a thermal recompressor.

6. The process of claim 3 , wherein said evaporator system further comprises a mechanical recompressor.

7. The process of claim 3 , wherein said evaporator system comprises an evaporator selected from the group consisting of a falling film evaporator, a short path falling film evaporator, a forced circulation evaporator, a plate evaporator, a circulation evaporator, a fluidized bed evaporator, a rising film evaporator, a counterflow-trickle evaporator, a stirrer evaporator, and a spiral tube evaporator.

8. The process of claim 3 , wherein said evaporator system comprises a vacuum.

9. The process of claim 1 , wherein substantially all of the salts are removed in step b) prior to removal of water in step c).

10. The process of claim 1 , wherein said nanofiltration comprises filtering said liquid fraction through a membrane having a pore size range from about 0.0005 to about 0.005 microns.

11. The process of claim 1 , wherein said purifying 1,4-BDO in step d) comprises distillation.

Assignees

• Genomatica Inc

Inventors

• Clark Warren
• Japs Michael
• Burk Mark J

Classifications

• B01D3/143

  by two or more of a fractionation, separation or rectification step · CPC title

• B01D3/002

  by continuous methods · CPC title

• B01D1/0094

  with forced circulation · CPC title

• C07C33/025

  with only one double bond · CPC title

• C07C29/76 Primary

  by physical treatment · CPC title